This application claims the benefit of and priority to European patent application No. 17382080.4, filed on Feb. 17, 2017, the entire disclosure of which is incorporated by reference herein.
The present disclosure refers to a rigging tool for setting a neutral position on a control surface of an aircraft, such as an elevator, a rudder, a flap, or an aileron.
Actually there are more than six tools to perform neutral position setting tasks of trimmable horizontal stabilizer elevators of an entire fleet. These tools have different purposes, sizes, and accuracies.
To provide a measure, the guide (16) is extended from the THS extrados skin up to the elevator. For that, the size of this type of guides goes from 2 to 3 meters long, which complicates its handling.
Further, it is necessary to have guides of various sizes to cover different types of aircrafts.
This tool is expensive, delicate and very difficult to assemble. Also, although a theoretical accuracy of 0.001° can be reached, the real accuracy usually reached is close to 0.5°, due to its extreme complex design, and the difficult to reach drawing tolerances when the tool is being assembled by the manufacturer.
It would therefore be desirable to provide technical approach(es) that offer a common solution for setting a neutral position on any control surface of an aircraft, while providing good accuracy, and simplifying its use and manufacture.
The present disclosure overcomes the above mentioned drawbacks by providing a rigging tool for a control surface of an aircraft having a compact and versatile design, and being adapted to be used on any trimmable surface.
An object of the present disclosure is to provide an accurate rigging tool capable of minimizing measurement deviations of current tools, offering deviations lower than 0.05°. It is a further object of the disclosure herein to provide this deviation value without complex or delicate adjustments.
Another object of the disclosure herein is to provide a versatile tool, adapted to be used in any trimmable surface of an aircraft.
Further, it is an object of the disclosure herein to provide a compact and lighter tool, easier to use, and easier and cheaper to manufacture than the tools actually in service.
The present disclosure refers to a rigging tool for a control surface of an aircraft comprising a laser, a target assembly, and a laser platform.
The laser is configured for outputting a low energy laser beam.
The target assembly comprises a plate and a support to sustain the target assembly on a surface of a control surface. The plate includes a target point to indicate the neutral position of the horizontal stabilizer elevator.
The laser platform is shaped as an elongated body provided with structure to rest on a surface of a control surface. This laser platform body has backward and forward extremes. The backward extreme is configured to hold the laser. The forward extreme comprises a pair of holes provided at opposite positions aligned with the output of the laser.
The incidence of a laser beam onto the target point upon passing through the pair of holes of the forward extreme of the laser platform indicates that a neutral position is set on the control surface.
With this configuration, the disclosure herein provides a versatile tool, adapted or configured to be easily used on any control surface, by the positioning of the laser platform at one side of the control surface and the target assembly at the opposite side of control surface. This way, the disclosure herein provides a tool that can be used on neutral position setting tasks of different aircrafts, since its design is not related with the size of the trimmable surface.
In addition, the tool offers a simple design, and requires fewer pieces than conventional tools, such as known optical tools, which involves an easier manufacturing, assembly, and use, and a considerable cost saving.
With the tool of the disclosure herein, deviations lower than 0.05° can be reached. Further, due to the special design of the laser platform, the laser beam can be easily adjusted to keep the desired accuracy by just doing that the laser beam passes through the pair of holes provided at opposite sides of the forward extreme of the laser platform. This way, the disclosure herein provides full accuracy without complex or delicate adjustments.
Further, due to this special design of the laser platform, the tool simplifies the calibration of the laser on each use, avoiding the need for specific calibrations.
Additionally, since the tool comprises a laser adapted for outputting a low energy laser beam, operators no longer need extra protection, such as polarized glasses for protecting eyes.
For a better comprehension of the disclosure herein, the following drawings are provided for illustrative and non-limiting purposes, wherein:
The rigging tool comprises a laser (9) for outputting a low energy laser beam (12), a laser platform (1) configured for holding the laser (9), and a target assembly (2) including a target point (24) to indicate that a neutral position of a control surface (10) is set.
The laser platform (1) is shaped as an elongated body comprising backward (1b) and forward extremes (1a).
The backward extreme (1b) is configured to hold the laser (9), while the forward extreme (1a) comprises a pair of holes (11) provided at opposite positions of the forward extreme (1a), in alignment with the output of the laser (9). This pair of holes (11) provides a simpler laser calibration. This way, the laser (9) can be easily adjusted on each use, avoiding specific calibrations.
According to a preferred embodiment, the pair of holes (11) are separated a length of at least 30 cm. With this configuration, the tool minimizes angulation errors, offering full precision results on distances up to 5 meters, provided the laser beam (12) passes through the pair of holes (11).
As shown in
For that, the target assembly (2) comprises a support (19) to sustain the target assembly (2) on a surface of a control surface (10), and a plate (18) coupled to the support (19) and including the target point (24).
As shown in
Alternatively, as shown in
According to another preferred embodiment, the backward extreme (1b) of the laser platform (1) comprises structure to vary the position of the laser (9) in the three dimensions of space. This way, the laser (9) is easy to manage.
According to another preferred embodiment, the forward extreme (1a) of the laser platform (1) comprises a battery (5) to feed the laser (9). This configuration improves the stability of the laser platform (1) on a surface, since the battery (5) compensates the weight of the laser (9).
According to another preferred embodiment, the target assembly (2) is a single body (made of one piece), and the support (19) comprises at least one foot (23) to contact and rest on a surface of a control surface (10). This way, the tool achieves better accuracy in the measurements, since it directly contacts with the surface of the control surface (10).
According to another preferred embodiment, the target assembly (2) comprises attaching structure coupled to the support (19) to fix the target assembly (2) to a surface of a control surface (10).
In both cases, the attaching structure fixes the target assembly (2) without needing to be riveted.
Finally, it should be noted that the target assembly (2) and the laser platform (1) may be positioned to be used on the extrados and on the intrados of a control surface, without requiring further adaptations.
While at least one exemplary embodiment of the present disclosure herein(s) is disclosed herein, it should be understood that modifications, substitutions and alternatives may be apparent to one of ordinary skill in the art and can be made without departing from the scope of this disclosure. This disclosure is intended to cover any adaptations or variations of the exemplary embodiment(s). In addition, in this disclosure, the terms “comprise” or “comprising” do not exclude other elements or steps, the terms “a”, “an” or “one” do not exclude a plural number, and the term “or” means either or both. Furthermore, characteristics or steps which have been described may also be used in combination with other characteristics or steps and in any order unless the disclosure or context suggests otherwise. This disclosure hereby incorporates by reference the complete disclosure of any patent or application from which it claims.
Number | Date | Country | Kind |
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17382080 | Feb 2017 | EP | regional |
Number | Name | Date | Kind |
---|---|---|---|
3612949 | Becraft | Oct 1971 | A |
3631601 | McNulty | Jan 1972 | A |
3635108 | Prince | Jan 1972 | A |
3723013 | Stirland | Mar 1973 | A |
4681439 | Shoemaker | Jul 1987 | A |
4730928 | Gabriel et al. | Mar 1988 | A |
5402226 | Matthews | Mar 1995 | A |
5438404 | Hamilton | Aug 1995 | A |
5467193 | Laewen | Nov 1995 | A |
5956150 | Kanne | Sep 1999 | A |
6124935 | Matthews | Sep 2000 | A |
6286219 | Palumbo, II | Sep 2001 | B1 |
6510615 | Budd | Jan 2003 | B1 |
6628378 | Marangoni | Sep 2003 | B1 |
7562809 | Chua | Jul 2009 | B2 |
8209874 | Tribble | Jul 2012 | B1 |
8706428 | Righi | Apr 2014 | B1 |
20020038513 | Kallesen | Apr 2002 | A1 |
20040117995 | Reed et al. | Jun 2004 | A1 |
20050223572 | Davis | Oct 2005 | A1 |
20140007397 | Stahl et al. | Jan 2014 | A1 |
20140115907 | Gamon | May 2014 | A1 |
Entry |
---|
Extended European Search Report for European Application No. 17382080 dated Jun. 26, 2017. |
European Office Action for Application No. 17382080.4 dated May 15, 2019. |
Number | Date | Country | |
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20180251236 A1 | Sep 2018 | US |